2 Answers

My GS 300 arlarm kept going off now for two months unless the battery is disconnected; the solution to my problem was that my key had an electrical fault. I confirmed it by placing the faulty key within a metal box or a steal pot with a heavy lid. upon doing so it stopped going off. I later purchased a new key

There is an anti-theft relay that is stuck open. that needs to be replaced. I'm unsure of the location, probably under the dash somewhere. it will be a small, plastic box about the size of a pack of cigarettes.

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check to see if you can adjust the sensitivity of the alarm as it may be temperature that is sending it off. If it m is a genuine factory fitted unit then have a talk to the service centre for clues. Also have you considered the possibility that an animal ( cat) is jumping on the bonnet to get warm from the engine heat

I would say you have two options, You can take it to the dealer and have it disconnected, or you can go to an aftermarket car stereo/alarm store they will install an aftermarket alarm and disable your stock one at the same time, for probably about as much as the dealer would charge to just disable it. First just call the dealer to get a quote on how much that would cost, and then call the alarm place and get a quote. Thanks,Lee